# What did Roger Apery mean by “Oh they grow in my garden”

Roger Apery, a French mathematician most remembered for proving that $$\zeta(3)\in\mathbb{R}\setminus\mathbb{Q}$$ (irrational) in $$1979$$. In this video posted by Numberphile: https://www.youtube.com/watch?v=ur-iLy4z3QE the person in the video briefly stated that during a seminar for which Apery unexpectedly proved the irrationality of $$\zeta(3)$$, mathematicians who attended that seminar asked him about how he came up with his binomial expansion of $$\zeta(3)$$, he replied:

"Oh they grow in my garden"

I do acknowledge the sense of humor that Apery had but what did he really meant/implied by his reply?